{"product_id":"full-power-plus-water-pump-kit-evinrude-johnson-20-35hp-1980-up-neoprene-impeller-housing","title":"Full Power Plus Water Pump Kit Evinrude\/Johnson 20-35HP (1980‑UP) — Neoprene Impeller \u0026 Housing","description":"\u003cp\u003e\u003cstrong\u003eThis Full Power Plus water pump kit replaces the Evinrude\/Johnson 20–35HP water pump assembly and housing (parts 393630 \/ 0393630 \/ Sierra 18-3382) for reliable cooling system rebuilding.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eKeep your vintage or later-model Evinrude and Johnson outboard running cooler by replacing worn cooling components with a complete rebuild kit. This kit includes the neoprene impeller, housing, gaskets, seals, mounting hardware and related pieces engineered to restore water flow and reduce the risk of overheating. Parts fit a range of 20, 25, 30 and 35 horsepower engines from 1980-up, with specified compatibility for 1985 and later models and select 1998–2001 units.\u003c\/p\u003e\n\n\u003ch3\u003eWhat parts are included and why do they matter?\u003c\/h3\u003e\n\u003cp\u003eThe kit supplies everything needed to rebuild the water pump and housing so you can replace deteriorated components in one service. Using modern neoprene for the impeller and durable metal alloys for the housing improves longevity compared with older, brittle parts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNeoprene impeller (395289) for consistent water flow and flex resistance\u003c\/li\u003e\n  \u003cli\u003ePump housing (393632) and pump cup (328751) for correct alignment\u003c\/li\u003e\n  \u003cli\u003eWear plate, impeller gasket (325537), seals, O-ring and install bolts for a complete reseal\u003c\/li\u003e\n  \u003cli\u003eKey and hardware to secure the assembly without extra parts hunting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I know this fits my outboard?\u003c\/h3\u003e\n\u003cp\u003eCompatibility covers Johnson\/Evinrude 20hp, 25hp, 30hp and 35hp models in the stated years; verify part numbers and model year before ordering. Check your engine’s service manual or the original pump part number to confirm match with 393630 \/ 0393630 \/ Sierra 18-3382.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 20hp models 1985 and later\u003c\/li\u003e\n  \u003cli\u003eFits 25hp models 1985 and later, including 1998–2001 Johnson\/Evinrude\u003c\/li\u003e\n  \u003cli\u003eIncludes the common OEM cross-reference numbers for verification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation and what tools are needed?\u003c\/h3\u003e\n\u003cp\u003eInstallation is a standard mechanical task for someone with basic marine repair skills and common hand tools. Removing the lower unit, swapping the impeller and housing, and reassembling requires care to align seals and torque bolts to spec; professional service is recommended if you’re uncertain.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequires lower unit removal and basic mechanic’s set (sockets, screwdrivers, torque wrench)\u003c\/li\u003e\n  \u003cli\u003eFollow engine manual torque values and shaft key installation steps\u003c\/li\u003e\n  \u003cli\u003eReplacing the impeller seasonally or after signs of wear prevents heat-related damage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and durability features does this kit provide?\u003c\/h3\u003e\n\u003cp\u003eComponents are manufactured from modern neoprene and robust metal alloys selected for corrosion resistance and long service life in marine environments. The design aims to withstand repeated wet\/dry cycles and the abrasive conditions inside cooling passages.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNeoprene impeller resists cracking and fatigue better than older compounds\u003c\/li\u003e\n  \u003cli\u003eAlloy pump housing resists warping and corrosion under normal use\u003c\/li\u003e\n  \u003cli\u003eComplete gasket and seal set minimizes leaks and ensures proper pressure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Boat owners, small-boat mechanics and marine technicians who maintain Johnson or Evinrude 20–35HP outboards and need a complete, reliable water pump rebuild kit. It’s ideal for seasonal maintenance, emergency repairs, or restoring performance on older engines when original pump parts show wear or failure.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this kit include the impeller and housing?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the kit contains the neoprene impeller, pump housing, pump cup, wear plate, gaskets, seals and install hardware.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this fit my 1999 Johnson 25HP outboard?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It fits many 25HP Johnson\/Evinrude models from 1998–2001; verify your engine’s part number matches 393630 \/ 18-3382.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Full Power Plus","offers":[{"title":"Default Title","offer_id":48083156631710,"sku":"B0721K1TRY","price":51.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/full-power-plus-front-packaging.jpg?v=1785826849","url":"https:\/\/northtrailauto.ca\/products\/full-power-plus-water-pump-kit-evinrude-johnson-20-35hp-1980-up-neoprene-impeller-housing","provider":"North Trail Auto","version":"1.0","type":"link"}